Most parents should start by teaching their baby between 8 and 15 core signs, focusing on words that appear frequently in daily routines. This range gives babies enough vocabulary to start communicating without overwhelming their developing brains and fine motor skills. Starting with too few signs (just 3 or 4) limits what your child can express, while starting with more than 20 can create confusion and slow down the learning process. A good starting set might include: milk, more, all done, help, mommy, daddy, water, please, and thank you. These signs address basic needs and social interactions your baby encounters multiple times every single day.
The key principle is matching the number of signs to your individual baby’s readiness, not following a one-size-fits-all approach. A 9-month-old who shows strong attention and hand-eye coordination might be ready to learn 12 signs at once, while a baby still developing motor control might do better with 8 signs over several weeks. Starting with around 10 signs gives you flexibility to add more as your baby progresses without creating a frustrating learning curve for either of you. Research from deaf families who use American Sign Language (ASL) shows that children exposed to signs from birth naturally acquire vocabulary at roughly the same pace as hearing children learning spoken language. However, babies without deaf parents in their household typically learn signs more slowly during the first year, which is why starting with a manageable, high-frequency set makes practical sense.
Table of Contents
- What Is the Ideal Starting Vocabulary for Baby Sign Language?
- The Challenge of Starting Too Many Signs Too Quickly
- Building Your First Sign Vocabulary Around Daily Routines
- Choosing Between Starting Small and Building Versus Starting Larger and Maintaining
- The Risk of Abandoning Signs Too Early and Inconsistent Implementation
- Adjusting Your Approach Based on Your Baby’s Developmental Stage
- The Broader Picture—Signs as a Foundation for Language Growth
- Conclusion
What Is the Ideal Starting Vocabulary for Baby Sign Language?
The ideal starting vocabulary consists of signs that your baby needs multiple times per day and that naturally fit into existing routines. This isn’t arbitrary—it’s based on how babies learn language in general. When a word or sign appears in context repeatedly, babies make faster connections. A baby who sees the sign for “milk” right before every feeding, paired with the actual bottle or breast, learns that sign far faster than one who occasionally sees signs used randomly. Signs for food-related words (milk, more, all done, water, eat), people (mommy, daddy, baby), and actions (help, please) give your baby the most communicative power for their effort. Consider the difference between learning 10 well-chosen signs versus 25 random signs.
A parent teaching 10 signs consistently will see their baby produce or understand those signs within 4 to 8 weeks. A parent teaching 25 signs inconsistently might see the same progress after several months, because the repetition isn’t there. The brain doesn’t retain what it doesn’t see regularly, whether that brain is 10 months old or 40 years old. Consistency beats quantity every time in early language learning. One important limitation: if you switch back and forth between English and sign language without committing to either one, your baby may take longer to acquire signs. Babies learning from birth need to see signs used consistently and in context. If signing appears only once a week during a special lesson but spoken English dominates the rest of the time, the brain won’t prioritize the signs the same way it would if signs appeared throughout daily life.
The Challenge of Starting Too Many Signs Too Quickly
Starting with more than 20 signs can actually slow down your baby’s progress and create parental frustration. When you introduce too many signs at once, several things happen: you can’t model each one consistently enough for your baby to retain it, you forget which signs you’re supposed to be teaching, and your baby gets confused about which sign goes with which meaning. Parents often report that when they try to teach too many signs, they end up reverting to speech more often, which undermines the whole exercise. The motor skill component is real and shouldn’t be overlooked. Your 10-month-old’s hands are still developing fine motor control.
Making the hand shapes for signs like “please” (rubbing the chest in a circle) or “thank you” (hand-to-mouth gesture moving outward) requires precision and motor planning that your baby might not have yet. Starting with signs that use larger, simpler hand movements—like “more” (bringing hands together) or “help” (one hand lifting the other)—gives your baby achievable targets. Once those are solid, you can introduce signs with smaller, more complex movements. A warning here: some parents fall into the trap of introducing signs for concepts their baby can’t yet understand, like “tomorrow” or “later.” These abstract time concepts don’t have meaning for babies under 18 months. Stick to concrete, observable things your baby experiences right now—not future or abstract ideas. This is where many well-intentioned parents slow themselves down by teaching signs that won’t stick because the baby has no real-world reference for them yet.
Building Your First Sign Vocabulary Around Daily Routines
Your starting sign set should revolve entirely around your baby’s daily schedule and the words that appear in that schedule repeatedly. If your baby’s day includes breakfast, a mid-morning snack, lunch, and dinner, then food-related signs (milk, more, all done, eat, water) are automatic inclusions. If your baby spends time with both parents, then mommy and daddy are essential. If help happens during diaper changes, getting dressed, or when your baby is frustrated, then help belongs in your core set. A concrete example: one parent working on signs with their 10-month-old structured the first 10 signs entirely around the morning routine. Milk came first because the baby had it at breakfast. More came next because the baby would get seconds. Mommy and daddy because both parents were involved.
Help because the baby gestured for assistance getting into high chair. Eat because it preceded the meal. All done because it ended mealtimes. Baby, please, and water filled the final slots. Within six weeks, this baby was reliably producing and understanding all 10 signs because every single one appeared in natural context multiple times every day. The advantage of this approach is that you’re not adding extra practice sessions to your day. You’re signing during moments that already exist—mealtime, diaper changes, bath time. Your baby sees the sign when it’s most meaningful, which accelerates learning dramatically compared to flash cards or structured lessons that feel disconnected from real life.
Choosing Between Starting Small and Building Versus Starting Larger and Maintaining
Two approaches exist for initial sign vocabulary: the “minimal core” approach where you start with just 6-8 signs and add more gradually, or the “foundational set” approach where you launch with 12-15 signs from week one. Each has tradeoffs worth understanding. The minimal core approach works especially well if you’re new to sign language yourself or if your baby shows slower language development. Starting with 6-8 signs and adding new ones weekly means you perfect your signing before introducing complexity. Your baby gets very solid with a small vocabulary before it expands. The downside is that your baby might express frustration because they can’t communicate everything they want to say.
If your 11-month-old wants to ask for juice but you’ve only taught milk, water, and more, they’re limited. Some parents find this creates more crying and frustration rather than less. The foundational set approach gives your baby more communicative power immediately, which often reduces frustration and increases engagement with signing. You’re busier tracking more signs and ensuring consistent modeling, but your baby can express more wants and needs right away. The tradeoff is that you need to be organized and consistent or some signs will get lost. For parents who are highly committed and have good memory, this approach typically produces faster overall progress. For parents juggling many responsibilities, the minimal approach may be less overwhelming.
The Risk of Abandoning Signs Too Early and Inconsistent Implementation
A major barrier to sign language success isn’t how many signs you start with—it’s whether you keep using them consistently. Many parents start with excellent intentions, teach 10-12 signs, but then drift away from signing by month three because speech takes over. Your baby says their first word, it seems easier than signing, and slowly the signs disappear. This inconsistency doesn’t just halt progress; it can cause your baby to forget signs they had learned. The other common problem is inconsistent implementation between caregivers. One parent signs consistently. The other doesn’t. A grandparent or daycare provider doesn’t know the signs at all.
Your baby then learns that signing isn’t necessary to communicate because spoken language works with many people. For signs to stick, they need to be used by multiple people in your baby’s life, not just one parent. If only one person is signing, commit to that reality and adjust expectations accordingly. Your baby will still learn the signs, but more slowly, since repetitions are fewer. A warning about screen time teaching: videos and apps can teach some sign basics, but they cannot replace human interaction for real language learning. Your baby needs to see signs from a live person, need to experience the natural responsiveness to signing, and need to practice with someone who reacts to their attempts. A video doesn’t respond when your baby tries to sign “more” or praise them for getting the hand shape almost right. Use videos as supplemental tools only, not as your primary teaching method.
Adjusting Your Approach Based on Your Baby’s Developmental Stage
A 7-month-old and a 14-month-old are in completely different places developmentally, even though both are under 18 months. Younger babies (6-9 months) typically learn best with 6-10 signs because their attention span is shorter and their motor control is still developing. Older babies (12-18 months) often thrive with 12-18 signs because they have better focus and more developed hand control. If you have a 7-month-old who is showing good attention and hand awareness, you might start with 8 signs. If you have a 13-month-old who’s already babbling and gesturing, 15 signs is entirely reasonable.
Individual variation matters enormously. Some babies are naturally more focused and interested in language. Others are more interested in movement and gross motor skills. A baby who watches your hands intently during diaper changes is showing readiness for more signs. A baby who squirms away and wants to crawl is telling you to keep it simple and brief. Watch your individual baby’s cues, not the calendar.
The Broader Picture—Signs as a Foundation for Language Growth
Starting with 8-15 core signs isn’t just about those specific signs. It’s about establishing signing as a communication tool in your baby’s world. Once your baby understands that hand shapes and movements mean something, that they can use their hands to ask for what they want, they become motivated to learn more signs. This motivation is the real win.
A baby who has learned that signs work becomes an engaged learner. Research on bilingual language development shows that children who grow up with two languages from infancy often progress through both languages slightly more slowly initially but catch up by age 3 and end up with stronger overall language skills. Sign-English bilingual children follow a similar pattern. Starting your baby with sign language doesn’t delay their language development; it expands it. You’re not choosing between signing or speaking—you’re building a foundation where both can coexist.
Conclusion
Start with 8 to 15 carefully chosen signs based on your baby’s daily routines, your individual baby’s developmental readiness, and your ability to implement them consistently. More signs aren’t better—consistent modeling of well-chosen signs in natural contexts is. Pick signs your baby sees and hears about multiple times every day, stick with them until they’re solid, and then add more. The goal isn’t to teach a massive vocabulary in the first year; it’s to establish signing as an effective communication tool so your baby stays motivated to keep learning. The number of signs matters far less than the consistency, context, and commitment you bring to signing.
A parent who signs 10 signs consistently will see results faster than a parent who teaches 30 signs sporadically. Watch your individual baby, adjust based on what you see, and remember that language learning is a marathon, not a sprint. Your baby will tell you when they’re ready for more signs—they’ll be asking you for words that you haven’t taught yet and getting frustrated. That’s the time to expand. Until then, stick with your core set and make those signs part of your daily life.